Remote Interface Reference 4
Keysight 34420A User’s Guide 183
The standard event register is cleared when:
– You send a *CLS (clear status) command.
– You query the event register using the *ESR? (event status register) command.
The standard event enable register is cleared when:
– You turn on the power and you have previously configured the meter using the
*PSC 1 command.
– You execute a *ESE 0 command.
The standard event enable register will not be cleared at power-on if you have
previously configured the meter using *PSC 0.
The Questionable Data Register
The questionable data register provides information about the quality of the
meter’s measurement results. Overload conditions can be reported in the
questionable data summary bit through the enable register. You must write a
decimal value using the STATus:QUEStionable:ENABle command to set the enable
register mask.
Bit Definitions — Questionable Data Register
A reading overload condition is always reported in both the standard event
register (bit 3) and the questionable data event register (bits 0, 1, or 9). However,
no error message is recorded in the meter’s error queue.
Bit Decimal Value Definition
0 Voltage Overload 1 Range overload on dc volts
1 Not Used 2 Always set to 0.
2 Not Used 4 Always set to 0.
3 Not Used 8 Always set to 0.
4 Temperature Overload 16 Range overload on temperature measurements.
5 Not Used 32 Always set to 0.
6 Not Used 64 Always set to 0.
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